Architectural design and optimization of internal structures in 3D printed electrodes for superior supercapacitor performance

• Published in: Journal of colloid and interface science Vol. 677; no. Pt B; pp. 21 - 29
• Main Authors: Gu, Shunyu, Du, Guangyu, Su, Yichun, Zhang, Yanfei, Zhang, Yuan, Li, Lvzhou, Pang, Huan, Zhou, Huijie
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 01.01.2025
• Subjects: 3D printing; Micro-supercapacitor; Ordered-layered-structure; Micro-supercapacitor; 3D printing; Ordered-layered-structure
• ISSN: 0021-9797; 1095-7103; 1095-7103
• DOI: 10.1016/j.jcis.2024.08.053

[Display omitted] •3D printing technology is used to construct a multi-layer structure inside the electrode to improve the electrochemical performance of the electrode.•The effective coordination between the material and the internal structure of the electrode improves the electrochemical performance of the electrode.•The layered structure between the asymmetric positive and negative printed electrodes promotes the transfer and transmission of charge between the electrodes.•A synthesis strategy for improving electrode performance of micro supercapacitor is proposed. The architecture of electrodes plays a pivotal role in the transfer and transportation of charges during electrochemical reactions. Selecting optimal electrode materials and devising well-conceived electrode structures can substantially enhance the electrochemical performance of devices. This manuscript leverages 3D printing technology to fabricate asymmetric supercapacitor devices featuring regular layered configurations. By investigating the impact of various materials on the internal architecture of printed electrodes, we establish a stratified electrode structure with an orderly arrangement, thereby significantly improving asymmetric charge transfer between electrodes. The application of 3D printing technology to construct electrode structures effectively mitigates the agglomeration of electrode materials. The 3D-printed VCG//MXene devices demonstrate exceptional areal capacitance (205.57 mF cm−2) and energy density (60.03 μWh cm−2), with a power density of 0.174 W cm−2. Consequently, selecting appropriate materials for fabricating printable electrode structures and achieving efficient 3D printing is anticipated to offer novel insights into the construction and enhancement of miniature asymmetric micro-supercapacitor (MSCs) devices.